Machine for trimming tenpins



Patented Dec. a7, ikea?.

UNITED STATES lPiiriiivri oFFice.

CARL O. JOHNSON, OF BRADFORD, PENNSYLVANIA, ASSICTNOR TO BRADFORD MACHINE COMPANY, OF BRADFORD, PENNSYLVANIA, A PARTNERSHIP CONSLSTING OF CARL O. JOHNSON, HARRY SHEA, PAUL D. BGNNER, H. W1' QUKIIN, HARRY COONEY, AND

E. CT. FLA-IERTY.

MACHINE FOR TRIMMING TENPINS.

Application filed November 29, 1926. Serial No. 151,437.

This invention relates to a machine for cleaning, polishing and truing bowling pins, the general object ot the invention being to )rovide means for rotating a pin-directly trom a motor, with a combined centering and clipping tool carried by the tail stock,

rain Jfor rotatably supporting thebase of the pin and means associated with 'the rain tor guiding a cutting tool to cause the saine to true the body and hase ot the pin.V

A further object olf the invention is to provide an adjustable bumper or spacer on the rain tor limiting the movement olf the rain and the parts associated therewith toward the pin.v f y A still :further object of the invention is to provide means for locking the ram in its adjusted position. i

Another object of the invention is to make the tool holder slidable on the torni or guiding means, carried bythe ranhso that the tool will be brought into Contact with the lower part of the body and the bottom end ot the pin.

This invention also consists in certain other features ot construction and. in the combination and arrangement of the several parte, to be hereinafter fully described, il-

lustrated in the'accoinpanying drawings and specifically pointed out in the appended claims.

Y In. describing niy invention in detail, retei'encc willv be had to the accompanying drawings wherein like characters denote like' or correspondingparts throughout the sev-l eral views, and in which-- n Figure 1 is an elevation of the device in use.

Figure 2 away. i v I Figure 3 is a section on line 3 3 of Figure 2. y

Figure 4 .is a section online 4:--4 of Figure 2. v

Figure 5 is a sectional view through the clutch tor connecting the top end of the pin with the motor." n K Figure 6 is a face view ot Figure 5. Figure 7 is an enlarged fragmentary top plan viewV of 'the frontend of the rain and. the parte associated therewith.

is aplan view with parts broken Figure 8 is a section on liuc 8--6 of Figure 7.

Figure 9 is a section on line 9-9 of Fig- Figure 10 is a section on line 10--1O'otA Figure 7.

In these views, 1 indicates the base of the machine which supports atV one end a motor 42.aud at its'other end the stand 3 for the tail stock ram 4 which is slidably lmounted in the guideways 5 horizontally arranged in the top of the stand. This ram is reciprocated by means ot the hand lever 6 which handle 11'by which it may be turned.

The'front end of the ram carries a Centering pin 12 and a cutting tool 13 which is so shaped as to engage the cup-shaped 'recess in the bottom oi' the pin A Vwhile the pin 12 is Vengaging the center hole of said pin. A bumper or stop plate 14 is adjustably connected with this end off the ram by the bolts 15 vengaging threaded holes in the ram and passingV through Vslots 15 formed in the plate.` This plate will engage the end of the pin A and thus prevent further movement of the ram. A form or guiding arm 16 is connectedwith the forward end of the ram at one side thereof and this arm comprises a curved orwardlyfextending part 16 and a straight portion/16 which is provided' with an extension 16". `The outer edge ot gaged with the tongue ot the arm by push,- ing it over the tongue ot veither the part 16' 'or the extension 16".

' The holder has a handle 2O at'one end and a plate 21 fastened to the hotly by a bolt (itl engage the body of' the pin and the bottom end thereon Figure 2 showing the tool cn-` gaging the bottom in tull lines and the body in dotted lines. By adjusting the stop plate 14 on the ram7 the amount ot material moved from the pin by the tool can be controlled. Of course, the arm 1 6 is so formed that the tool will be so positioned that it Will true the body and the bottom of a pin and clean and polish the same. A leg is fastened to the outer end of the arm 16 to support the same from the base.

The means 'for supporti the top end of' the pin rotatably connecting it with the motor comprises a clutch device which consists oit a metal cup 2G which has its necl fastened to the vshaft olf the motor2 and a cup-shaped member 27 'torni-ed of rubber or the like 'which is held in the cup 26 by the screw 29. ylhis block 28 is provided with a semi-spherical socket 30 andthe inner Wall of the resilient cup 27 is formed with an annular shallow groove 31. rlhis resilient cup Will act, to pull the top end of the pin A into the clutch until its end engages the socket 30 and thusr properly position the pin and cause it to rotate on its axis.

From the foregoing it Will be seen that apin can be easily placed in the device by drawing the ram 4i to the rear by the lever G so that a pin can have its head placed in the clutch and then the ram is moved 'forwardly until. its pin 12 engages the hole in the bottom of the pin. The stop plate 14: is then adjusted to space the ram and the arm 16 a su'llicient distance from the pin so that the tools 13 and 24: Will eng-age the pin to out therefrom a suiiicient amount of material to clean and polish the same and to true the pin. The tool holder 19 is moved over the part 16 to true the body ot the pin and then it is pushed over the extension on tov the part 16 to true the bottom ot the pin. The tool 13 will cut the Wllso't the recess in the bottom of the pin.

. This tool will bring a pin to its original standard diameters ot both the body and base and the lp'n can be operated on again and again until its height is reduced beyond the height called :tor by the regula' tions. v

It is thought from the foregoing description that the advantages andY novel features of my invention Will be readily apparent.

'I desire it to be understood that I may ymake changes in the construction and in the nemend part and a tool holder adapted to be moved over both the curved part and the straight part of the arm to bring its tool in engage ment with the sions and base et the bowling pin.

2. A machine for trimming bowling pins comprising a motor, a friction clutch connected with the shaft thereof for engaging the head olla bowling pin to be operated on by the machine,l a support, a reciprocatory member carried thereby, acentering pin carried by the member tor engaging a hole in the base oi the bowling oin. a Ouidino' arm ef l en. Vo

carried by the reciprocatory member and including a curved part and a straight part, a tool holder adapted to be moved over both the curved part and the straight part ot the arm to bring its tool in engagement with the sides and base of the object a stop plate on the reciprocatory member tor engaging the bowling pin to limit the inward movement ot the reciprocatory member and its guiding arm. y

3. A machine for trimming bowling pins comprising a motor7 a friction clutch connected With the shaft thereof tor engaging the head oit a bowling pin to be operated on bythe machine, a support, a reciprocatory member carried thereby, a centering pin carried by the member tor engaging a h 'ole in the base ot the bowling pin,V aguiding arm carried by the reciprocatoryY member and including curved part and a Vstraight part, a tool'holder adapted to be moved over both the curved part and the straight part of the arm to bring its tool in` engagement with the sides and base of'the bowling pin and a cutting tool at one side of the centering pin for engaging the Walls of avrecess Aformed in the base of the bowling pin.`v

4;. A machine for trimming bow'lingpins comprising a motor, a friction clutch connected with thevshatt thereof torengaging the head ot a bowling pin to be operated on by the machine, afsupport, a reciprocatory member carried thereby, af centering pin carried by the member tor engaging a hole in the base ot the bowling` pin, a guid ing arm carried by the. reciprocatory niember and including a curved' part and a straight part, a tool holder adapted to be moved over both the curved part and the straight part of the arm to bring its tool in engagement with the sides and base of the howling pin, a cutting tool at one side of the centering pin for engaging the'walls of a recess formed in the base of the bowling pin and a stop plate on the reciprocatory member for engagingthe bowling pin to limit the inward movement of the reciprocatory member and its guidingarm.

5. machine for trimming bowling pins comprising a motor, a. friction clutch connected with thc shaft thereof for engaging the head of a bowling pin to be operated on by the machine, a. support, a'reciprocat-ory 'member carried. thereby, a centering pin carried b y the. member for engaging a hole in the base of the bowling pin, a guiding arm carried by the reciprocatory member and including a curved part and a straight part, a tool holder adapted to be moved over both the curved part and the straight part of the arm to bring its tool in engagement with the sid-es and base of the bowling pin and means for locking the reciprocatory member in adjusted position.

6. A machine fortrimming bowling pins comprising a base, a motor supported at one end of t-he base, a` stand supported at the other end of the base and having a guideway in its top, a ram slidably mounted in the guideway, a lever for Amoving the vram, means for locking the ram in adjusted position, a guiding arm connected with `the forward end of the ram, and includinga straight portion which is connected with the ram and a curved forwardly extending portion, a tool holder adapted to be moved over each portion of thev arm, a tool carried by the holder, a centering pin at the front end of the ram, a curved cutter associated with the pin, a stop plate connected with the ram and 'adapted to engage a bowling pin being operated upon by rthe machine to limit theforward movement of the ram and a resilient holder for one end of a bowling pin connected with the motor shaft, the other end of the bowling pin having a hole therein for receiving the centering pin.

7. In a pin trimming machine, a `driven shaft, work engaging means connected therewith, supporting means, aV slidable element carried by the supporting means, work centering means controlled bythe slidable element, and tool mounting means positioned simultaneously with the movement of the slidable element and including members for supporting the tool for movement along the side of the work and transversely of the longitudinal axis thereof.

8. In a pin trimming machine, a driven' shaft, work engaging means connected therewith, supporting means,v a slidable element carried by the supporting means, work centering means controlled by the slidable element, and tool mounting means positioned simultaneously with the movement of the slidable element and including members for supporting the tool for movement along the side of the work and transversely of the longitudinal axis thereof, and means for retaining the tool mounting means in an adjusted position.

9. In a. pin trimming and polishing machine, work engaging means, means for rotating same, a slidably mounted element, operating means therefor, mounting means positioned simultaneously with the movement of the slidablc element andincluding portions for supporting a tool for movementv along the sides of the work and transversely of the main axis thereof.

l0. In a pin trimmingand polishing ma.- chine, yielding work engaging means, means for rotating same, a slidably mounted element, operating means therefor, mounting and guiding means positioned incident to the movement of the slidable element and including portions for supporting an operating element for movementin two directions with reference to the main. aXis of the work.

ll, fr machine forl trimming'bowling pins .fson'iprising a motor, a friction clutch connected. with the shaft thereof for engaging tl e head of ay bowling pin to be operated on by themachine, a support, a reciprocatory member carried thereby, a guiding arm carried by 'the rcciprocatory member, said having a curved path and a tool hol der adapted to be moved over the curved path to bring its tool into cutting engagement -with the sides of the bowling pin. Y

12. A machine for trimming bowling pins comprising a motor, a friction clutch vconnected with the shaft thereof for engaging the head of a bow] ing pin to be operated on by the machine, a support, a reciprocatory member carried thereby` a guiding arm carried, by the reciprocatory member, said arm having a curved path thereon, a toolholder adapted tol be moved over the curved path to bring its tool into cutting engagement with the sides of the bowling pin and a stop carried by the reciprocatory member for cngaging the bowling pin to limit the inward movement of the reciprocatory member and the guidingarm.

13. In a machine for trimming bowling pins,fthe combination of a head chuck for gripping the head of the pin, a. motorfor rotating the head and pin, a stationary tailstock, a member carried by said tailstock and movable with relation thereto and a tool guide movable with said member into a predetermined position.`

14E. In a machine forv trimming bowling pins, the combination of a head chuck for gripping the head of a pin, a motor for rotating the chuck and pin, a stationary tailstock, a member carried by said tailstock and movable with relation thereto, a tool guide movable with said member and means movable with said lmember and said guide tor limiting the movement thereof.

l5. In a maehine lor trimming bowling pins, the eon'ibii'iation ot a clnick for gripping the head ot a pin, a motor 'for rotating the chuck and pin, a support, a member carried by said support and movable with relation thereto, a tool guide carried by said memb f and moyable therewith` and nfieans movable with said member and said guide and adapted to abut the base ot a pin .tor limiting the movement ot the guide.

i6. il machine for trimming howlin .comprising a .Clutch tor ripping tl e head 'of a bowlii'ig pin, motor ior rota ng the clutch and Vbowlirg pin, ay support and centering pin carried by said sfoiport, combination with a reciprociitory lool Vguide carried by said support.

17. A machine for trimming bowling pins comiirising a clutch 'for gripping the head of a, bowling pin, a n iotor for rotating the clutch and bowling pin, a support and a centering pin carried by said support, in combination with a reciprocatory tool. guide carried by said support and a reciproeatory stop carried by said support l'or lin'iiting the movement ot said tool guide.

18. A machine 'lor trimming howling pins comprising a motor, a clutch connected with the shaft thereof for engaging the head ot a bowling pin to be operated on by the maehine, a support, a reoiprocatory centering p i ne #pin carried by said support, a tool. holder,

a guide for forcing` said tool holder to tollow a predetermined path and means Whereby said guide may be made to assume a predetermined position with relation to the base of the bowling pin.

l). In a machine for trimming bowling pins comprising a motor, a rotatable elntcli for holding the head ot a bowling pin, and

a centering pin; the combination of a tool trimming lthe have oi a pin, and means co-` operating with said tool holderlo guide 'same along a curved path 'for trimming the tace ot a pin.v

2l.-ln a pin trin'in'iing'machine comprising a d iiyen shatt and Workengaging means connected therewith; the combination of a tool holder and longitudinally means cooperating therewith to guide the tool holder Yfor movement along the sides of the inferi-z 'lier trimming the tace o't the pin` and 'transversely ot the main axis thereof, iter trimming the base oit the pin7 whereby the tool holder may he guided along two independent paths successively byan intermediate shifting ot the position of the tool holder. v i

Q2. ln a pin trimming machine comprising a driven shaft and Work engaging means connected therewith; the combination of a tool holder, means cooperating therewith to guide the tool holder for movement along the sides of the Work and transversely of. the main anis thereof, whereby said tool holder may be guided along two independent paths successively by an intermediate shitting ot 'the position ot the tool holden' and means tor variably positioning said .first Vnamed means with relation to the base ot the pin along a line parallel. to the axis of' the Work. l lin testimony whereof I aiiix my signature.

CARL i C). JOHNSON.

sl idable 1 

